Move lots of GMock stuff out of line.

chrome/common/notification_observer_mock.h

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_COMMON_NOTIFICATION_OBSERVER_MOCK_H_
 #define CHROME_COMMON_NOTIFICATION_OBSERVER_MOCK_H_
 #pragma once
 
 #include "chrome/common/notification_observer.h"
 #include "chrome/common/notification_type.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 class NotificationDetails;
 class NotificationSource;
 
 class NotificationObserverMock : public NotificationObserver {
  public:
-  NotificationObserverMock() {}
-  virtual ~NotificationObserverMock() {}
+  NotificationObserverMock();
+  virtual ~NotificationObserverMock();
 
   MOCK_METHOD3(Observe, void(NotificationType type,
                              const NotificationSource& source,
                              const NotificationDetails& details));
 };
 
 #endif  // CHROME_COMMON_NOTIFICATION_OBSERVER_MOCK_H_